Hello, CodeGiraffe 👋

Energy Shares US

• Responsible for server, back-office maintenance, and new feature development of the renewable energy investment crowdfunding platform Energy Shares US.
• Implemented REST API using Spring Boot and stored data using MySQL.
• Built a deployment CI/CD pipeline linking Github Actions > ECR > Event Bridge > ECS.
• Improved test reliability and optimized execution time.
  • Enhanced query reliability by adding Repository Test via Testcontainers.
  • Optimized test execution time by separating @SpringBootTest into @WebMvcTest and @DataJpaTest, reducing it to one-third.
  • Introduced Self-Hosted Runner to optimize execution time and prepared failover measures in case of Self-Hosted Runner downtime.
• Built a distributed tracing system using Grafana Tempo.
• Improved log tracking by adding TraceID and SpanID to logging fields and changed logging format to JSON for easier searchability on platforms.
• Developed a configuration file comparison tool to resolve environment configuration omission issues during deployment.
• Conducted load testing using Locust to define appropriate server specs and improve performance.
  • Improved performance by asynchronizing cases where responses slowed due to external platforms using AWS SQS.
  • Used Redis to cache slow API responses, reducing load.
• Used Prometheus for monitoring.

Acloset

• Responsible for API, batch, server maintenance for the Acloset service handling 400,000 MAU.
• Designed basic data structure for second-hand transactions and implemented related APIs.

Looko AI

• Constructed the backend for the service Looko AI to enhance work efficiency for vintage clothing businesses.
• Used Echo framework in Golang and stored data with MongoDB.
• Synchronized service status of orders/products/claims from three multisources (Acloset, Cafe24, Naver Smart Store) with Looko AI using FSM, processing real-time synchronization for 300,000 products and 50,000 orders.
• Built serverless functions to refresh platform tokens using AWS Lambda and Event Bridge.

• Responsible for back-office server maintenance, trading view development and deployment as a backend engineer.
• Refactored SQL queries in Django to Django ORM.
• Implemented stock charts using the Javascript module Trading View.

• Led the development of the blog platform “Plog” for developers, mainly for learning purposes.
• Conducted weekly meetings to monitor progress and used Github Discussion for documentation.
• Implemented REST API using Spring Boot and stored main data with PostgreSQL.
• Used Redis for API caching and email verification.
• Built deployment CI/CD pipeline linking Github Actions > ECR > ECS.
• Conducted Repository Test via Testcontainers, and wrote unit test codes for each layer.
• Used Grafana to monitor CloudWatch logs.
• Implemented the frontend using React, deployed with AWS Amplify.
• Implemented file upload and markdown editor using Toast UI Editor.

• Conducted an algorithm study to enhance the individual algorithm-solving capabilities.
• Held discussions and code reviews for solved algorithm problems twice a week.
• The content of this study can be found on the corresponding Github.

• Conducted a Python clean code study to delve deeper into Python used within the company.
• The content of this study can be found on the corresponding Github.
• Documented the study’s outcome as an e-book titled Python Incorrect Codes using WikiDocs.

• Conducted this project to develop a platform that manages model names and warranty periods of various products simultaneously.
• Developed an API for user warranty management through model extraction from shopping mall text using Python.
• The actual implementation of this project can be found on the corresponding Github.
• Detailed information about the project is available on the corresponding Notion.

• Delivered Python basics lectures to enhance club members’ skills as an initial member of the club.
• Conducted Python basic lectures for the Inha University Big Data Club IBAS.
• The conducted lectures are available at this link.

• Responsible for overall backend architecture and development using Django’s MTV (Model, View, Template) pattern.
• Shared project progress through weekly meetings and managed project timelines.
• Configured the frontend using Django Template and transmitted data using Django Context.
• Deployed using AWS EC2 and configured the web server using Nginx.
• The actual implementation of the project can be found on the corresponding Github.

• Participated as a mentee in the Hanium ICT Mentorship.
• Conducted projects using the Spring Legacy framework.
• Conducted projects extracting related search terms through simple word counting using Hadoop.

• Delivered Oracle Database SQL lectures at the Inha University Programming Club IGRUS.
• The conducted lectures are available at the following link.